Question: Who is the writer of A Brief History of Time by the professor of Dennis W.Sciama?
Paraphrase: Who wrote  A Brief History of Time by the professor of Dennis W.Sciama?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q471726 wdt:P50 ?answer . ?answer wdt:P1066 wd:Q284336}
Answer: Stephen Hawking